Improvement in permutation-locks



anna sale (mam (tiioz,

'CHARLES rLnscH, or Rocnnsrna vNEW YORK.

Letters Patent No. I'10,560,dated December 27, 1870.

o IMPROVEMENT IN PERMU'TATION'LOK The Schedule refen'e. to in these Letters Patent and making part of the same.

Nature of the Iweatton.

This invention consists in an improved construction of the lock and of the bolt-work, a's hereinafter described.

Gfmeral Description.

This' cam is of special construction, being provided with a hook, a, formed by cutting a curved slot into its periphery, for the purpose of drawiiig down the lever, as hereinafter described, and having also a curved recess, b, which receives the end of the bolt, which will also be presently explained' vThis eurved'recess 'is madein the periphery, but with flanges on either side, which hold the bolt inplace laterally. i v

1 The side c ,of the hook-slot forms the cam for .throwing up the lever;

D represcnts the lever, which is pivoted at (Z. It-

has a pin, j, which operates in connection with the hook a and cam-face c, as before described.

aIt also has a pin, g, which rests in a slot, h, of the bolt. i

This pin, when the lever is drawn down by the book,

elevates the front end of the bolt, and, when the levcr is thrown np by the cam-face, rises in the slot, whose length is adapted to the purpose.

The lower end of the slot`is madev roundcd, as shown at 71/, to allow the free working of the parts.

E represents the bolt of the lock proper which is pivoted at t. It is in the form of a hook, the front end Z striking over the stud 7a, which is fixed to the lock-case, while the rear, end 'm is rounded of such shape as to strike vinto recess l) of the cam when dcpressed, as before described. i 4

rl`his end of the bolt has also a sl'ight conca 'c, n, which fitsthe circle of the cani;'t=he object being to give a steady bearing and close jointnre of the parts.

expended upon the'fixed stud lc, and will not extend to the working parts of the lock, neither will it afiect the pivot i.

ing, 17, which rests upon the periphery of the cam.

It also has a spring, s, which projects forward 'and bolt.

As the arm rides on top of the cam the spring holds np the' pin g, and, conseqncntly, its lever D a little higher, which elevates the dog of the lever that falls into the notches of the 'tumblers s'o far above the tumblers that it cannot come in contact therewith.

It also gives a degree of elasticity to the lever D, and,'as the bearin g p wears away, its elasticity provides a compensation by still'holding the lever np from contact with the Wheels.

H H represents the bolt-work of the safe or door, which has a stem or bearing, r, that strikes the bolt E when locked.

It has a slot, q, which slides freely over the spindle I as the bolt-work is thrown.

At the top also it has a shonlder, t, which strikes' stopu, and below this a notch or slot, o, which allows said stop to enter'when it falls.

K rcprescnts a'stiif arm or elhow which is pivoted tuse angled, as shown, the front end carrying the friction-roller n., which forms the stop before Spoken of,

'a bearing, w, which rests against the lock-bolt. v

The upper part has pivoted thereto a swinging latch, L. Said latch has a pin, x, which rests in a slot, y, of the stem r. i

The lower end of the latch falls into axsocket, z, of

the cam M, by which, when in proper position, the bolt-work is thrown forward and 'backward At the extent of throw' outward the cam clears the latch, which then simply rides upon its surface.

1twill also be no'ticed that the pressure of the' boltwork will come upon the stop "u, and, as the arm that carrics the stop stands angnlarly upward,-the force will' be expended lupon the stud e of the door, and not the stud k of the lock-(msc. By this 'means the strain is anism of the lock-work.- Shonld the stop u fail, it would then strike the end of bolt E, but, even in that case, the strain would be received by the fixed Stud lt, and no harm could then come to the 1ockwork even if the safe were tipped on one side, as is'sornetimes done, thereby bringing the lock-work'in position shown in fig. 3; still no strain could come on the lock-bolt, as the ohtnse-angnlar form of the arm K would keep the latter in position to. receive the stock or stud e.

I am aware that a rack-bar has been connected with Any strain applied to the front end of the bolt will be.

G represents an arm pivoted at o, and having a hear-l rests under the' pin g, which rests in the slot of the atj upon a fixed stud, c, of the door.. It is made ob while the rear end, which is depressed, is formed into,

isolated or cut off-from` any connection with the mecha gear-wheel in place of cam M, which throws out of and into gear; but such is not the equivalent of my ai'rangement. Such a device Would not answer the purpose ot' mine if the safe were turned ou one side, as above described.

C'latms.

What I claim, and desire to secure by Letters Patnet, is-

l. The construction of the cam O, with the hook a, cam-face c,'-and peripheral recess b, the whole arranged as dcscribed, and Operating in the manner and for the purpose specified.

2. The combination, with the level' D and holt E, of the arm G, provided with the spring s, which projects forward and bears under the pin g, the effect being to always holdsaid pin elevated in its slot, and

thereby secure the stiff connection of the levei' and bolt, as described.

3. In combination with the lock-hoit E and boitstem 'r, the singleiobtuse-angled elbow K,.having its upper end arined with a rollei', or equivalent stop u,

which takes the strain from the lock-bolt, and pro! vidcd with the depending latch L, which engages with the cam of thespindle 1', as herein specified.

4. The combination and arrangement of the cam hook-bolt E, level' D, spring arm G, and obtuse-augled elbow K, Operating in the manner and foi' the purposes set forth.

CHARLES FLESQH.

Witnesses R. F. Osooon, I. P. BARNES. 

